Custom Roads allows organizations to combine roads that they manage with StreetMap Premium for ArcGIS streets based on HERE data for a single continuous routable transportation network. StreetMap Premium for ArcGIS Custom Roads is a separate, orderable product (in file geodatabase format) from Esri Customer Service.
Nota:
The StreetMap Premium Custom Roads dataset is provided on the media in Read-Only format. After you copy the data to a local drive, make sure that the dataset (FGDB and .aprx) is set to a non-restricted or non-read-only setting before beginning any editing.
The following help documentation is available for customers with licensing to use StreetMap Premium Custom Roads:
StreetMap Premium for ArcGIS Custom Roads—ArcGIS Pro 2.3 (PDF)